Hydrodynamic and Hydrochemical Study in Oil Reservoirs: Asmari reservoir, Rag-E-Safid Oil Field
Subject Areas : Petroleum Geology
بهمن سلیمانی
1
(Petroleum Geology and Sedimentary Basin Dept., Faculty of Sciences, Shahid Chamran University of Ahvaz)
abdolah Momeni Faizhabad
2
(Petroleum Geology and Sedimentary Basin Dept., Faculty of Earth Sciences, Ahvaz, Iran, )
Mousa Zohrabzadeh
3
(NISOC)
Keywords: Hydrodynamic current, Asmari reservoir, hydrochemistry, Piper diagram.,
Abstract :
The evaluation of hydrodynamic characteristics can be a useful tool to understand the field behavior and production efficiency. The present study is an attempt to clarify hydrodynamic flow in the Asmari reservoir of the Rage Safid oil field. Water oil contact (WOC) depth is 200m lesser in northern flank than southern part. The results indicated that the aquifer potentiometric surface is tilted. The Piper and Composition diagrams are showing the mixing process of two water types including Cl-Na type with higher TDI and calcic-magnesic bicarbonate type with lower TDI in the reservoir water. The first one is sourced from salt horizons of Gachsaran Formation and the second one is from limestone-dolomitic parts of the Asmari Formation. This result is also verified by TDI to depth plot. Hydrodynamic maps and fluids trends are showing a continuous flow from NE to W-SW of the field. This flow is relatively strong in western and south western part. Generally, production index and pressure data indicate a suitable condition in southern –southwestern part of the field. By considering fluid flux from NE to W-SW it is strictly proposed to focus drilling program in the western part and the water injection program in the north eastern part of the field.
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